A Continuum Based Solid Shell Element Based on EAS and ANS
2015 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE credits
Student thesis
Abstract [en]
This work is a stepping stone towards developing higher order shell element for
simulating composite manufacturing procedure. In this study, a continuum
approach suitable for combined material and geometrically nonlinear analysis
for an eight node solid shell element SS8 is explained. The formulation of SS8
comprises two ingredients to alleviate undesirable locking effects: 1) Assumed
Natural Strain concept, which has proven to alleviate the curvature thickness
and transverse shear locking problems. 2) Enhanced Assumed Strain, which
adds enhanced degrees of freedom to improve the in-plane response of the
element and the curvature thickness locking problem. This formulation has
been extended to represent geometric and material non-linearity using Total
Lagrangian approach. Finally, finite strain formulation has been verified by
numerical examples. Results when compared to continuum shell element in
ABAQUS show a reasonable agreement with a relative error of less than 2%.
Place, publisher, year, edition, pages
2015.
Keywords [en]
Lagrangian, Finite Strain, Solid Shell Element, Enhanced Assumed Strain.
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:bth-11616OAI: oai:DiVA.org:bth-11616DiVA, id: diva2:901457
Subject / course
MT2525 Masters Thesis (120 credits) in Mechanical Engineering with emphasis on Structural Engineering
Educational program
MTAMT Master of Science Programme in Mechanical Engineering with emphasis on Structural Mechanics
Supervisors
Examiners
2016-02-082016-02-082016-06-16Bibliographically approved